ok i need to know a couple things and i know im gunna sound like a tard but what is the difference between 6bolt and 7bolt, besides the notorious crank walking in the 2g 6bolt. plus will a 6bolt head mount up to a 7bolt block. what all am i going to need to do a 1g swap? this is going to be my first 4g63 so im clueless here. someone help me out.